Radiator vent valve

Abstract

A vent valve (10) is disclosed. The valve (10) is comprised of a conduit (12), a cap (14), a nut (16) a bolt (18) and a coupling (20). The coupling (20) connects with a conduit (12) to a radiator (12). A pair of slots (44) in the nut (16) form a vent passage for steam and air to escape the valve (10).

I claim: 
     
       1. A vent valve for use with a radiator comprising: a conduit adapted to be placed in fluid communication with a radiator, said conduit having a first portion, a second portion extending transversely therefrom and a hollow interior extending through said portions of said conduit;   said hollow interior of said second portion of said conduit having a wide section of a first diameter, a narrow section of a second diameter less than said first diameter, and a tapered section disposed between said wide and narrow sections and having a diameter tapering between said first and second diameters, said narrow section being disposed below said wide section;   said second portion having a threaded exterior and an upper edge;   a cap having a threaded interior surface mating with the threaded exterior of said second portion and an upper interior surface with a hole formed therethrough, said cap being threaded down into said second portion;   a nut supported on said upper edge within and beneath said cap and secured thereto by contact with said upper interior surface of said cap;   a bolt having a head facing outward and a body extending inward through said hole, threaded into said nut and extending into the hollow interior of said second portion of said conduit said bolt having a length sufficient for its body to reach into said narrow section when said bolt is screwed downwardly through said nut; and   at least one opening formed through said nut to provide a vent passage from said hollow interior of said conduit.   
     
     
       2. A vent valve in accordance with claim 1 wherein said at least one opening includes a pair of said slots formed in said nut, each slot extending from the outer circumference of said nut inwardly. 
     
     
       3. A vent valve in accordance with claim 2 wherein said conduit is comprised of a compression elbow with the wide section of the hollow interior having a diameter of 5/16th of an inch and the narrow section of said hollow interior having a diameter of 3/16th of an inch, said nut being an 1/8th inch nut and said bolt being a 1/8th inch bolt, and each of said slots having a width of 1/32nd of an inch. 
     
     
       4. A vent valve in accordance with claim 1 including connector means for connecting said valve in fluid communication to the radiator such that said first portion of said conduit extends generally horizontally and said second portion of said conduit extends generally vertically. 
     
     
       5. A vent valve in accordance with claim 1 including an indicator gauge attached to and extending from said conduit adjacent to said bolt whereby the position of said bolt can be gauged.